Upper-pulling machine



BATES.. UPPER PULLING MACHINE. APPLlcATloN man SEPT. 1.1920.

Patented 001;. 3,1922."

llpatented @et 3, i922.,

nieren-runnin@ rracrrrun.

Application filed September l, 19243. Serial No. 407,531.

To all 'who/m t may concern.'

Be it known t-hat l, ARTHUR liect ot the King ot England, residing at Leicester, Leicestershire, LEngland, have invented certain Improvements in Upperlulling Machines, oi which the 'following` description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indi- ,ating like parts in the several figures.

rfhis invention relates to upper pulling machines for use in the manu-Facture ot boots and shoes. ln some oi' its aspects the invention has particular advantaA as applied to pulling-over machines, which pull the upper at the toe and the opposite sides at one operation, and the invention is herein illustrated in its application to a power pulling-over machine oi1 a well-known type characteristic fea'tur s of which are shown and described in United States Letters Patent No. 1,029,387, granted on June 1l, 1912, upon an application oit R, l?. lvicFeely. It is to be understood, howe Wer, that the invention in many of its aspects is not limited to machines oil the illustrative type nor to any particular type oi' upper pulling machine. Experience in the use ot upper pulling;v machines has demonstrated that ttor some or wcrlf advantages are involved in ..i i, rec o', alternately with the stressing of the upper. For eX- auiple, in T ltates Lette-rs .Patent- No.

Barns, a suby am l. i

Jnited granted on January 5, 1915, upon lice-tion oir' Charles l?. Bennion, it Ywas ed in a. pulling-over machine to relai; "he sprintf tension oi" the "yielding` upper pulling means at an intermediate stage in the upper pullingY opa-iratici'i, the construe-,-

oroanization ot means tor pulling' f. o' the tension olf' an upper tion there shown having particularly in view grips the margin of the upper. The invention is herein illustratedl in its application to means for pullingan upper at the toe end of a last in an organization similar to that shown in said prior Bennion patent, the construction shown comprising means for imparting to the toe gripper a positive tension relaxing` movement between successive pulling movements of the gripper e'leeted yieldingly through the action of its updraw spring. lnsurance is Athus afforded that for each shoe the pull on the upper shall be definitely relaxed, irrespective ot the character o ii the upper and the last and of friction between the upper materials and the last. i

ing,- the upper at the toe end ot a last in an organization designed to. effect a give and take action between the toe Igripper and the side grippers, it is to be understood that in many of its aspects the invention isnot limited to means for pulling at the toe but has in contemplation advantages to be secured b v alternate pulling and relaxing movements irrespective of the location at which the upper pulling torce is applied.

The above and other features of the invention including certain details of construction and combination of parts, will now be more particularly described with reference to the accompanying drawings and pointed out in the claims.

ln the drawings: Figure 1 is aview in side elevation, with parts in section, o1.; a portion ot' a pullingover machine in 'which the invention is eniliodied. y

Fig. 2 is au enlarged detail view showing more clearly than Fig. 1 mechai'iism pro- TWhile the invention is thus illustrated in its application to means 'tor pull- 'v vided for imparting' tension relaxing movement to the toe gripper, with the partsy as they appear at a later stage in the cycle ot operations than that illustrated in Fig. 1, and y B is a detail view or the toe gripper cperatingcam. i

As in prior machines of the illustra-tive tlvpe, vthev upper pulling means comprises a. toe gripper 2 and opposite side grippers' L connected respectively to an intermediate updraw lever G and to side updraw levers 8 `tulcrumed at 10 on the head of the machine. At their rear ends the levers 6 and 8 are in swiveled engagement with blocks f2 slidingly mounted on updraw tension feds 4 which ca ry updraw ension springs le acting between said hlocls and tension nuts 18 on the upper ends oi4I die rods. rlhe rods ist are secured in lugs 2O which project laterally Yfrom vertically movable cam slides 22 and 2li for imparting` operative movements respectively to the toe gripper and t":" sl e ,fr A pers rthe slide 2/lhas a roll e en effing; in a cam groove 2S formed inthe 'tace or cam wheel 30 'tast on the usual cam shaft ot the machine, and the toe gripper slide 22 has a roll 3s*- enp'aging in a cam groove 36 'formed a toe gripper operating cam wheel 3S also tast on the shalt lt will be understood that upon the starting); of the machine the slides and 24- are moved downwardly hy their cams and act through the springs 16 to close the several gripper jaws on the upper and then to impart upper pulling movement yieldingly to the toe `and side'grippers, eiliectinfr a relative sepa-ration between the swivel blocks l2 and the lugs 20 proportional to the compres` sion or the springs At the end of the Lipper pulling operation vthe machine comes automatically to a stor te permit inspection and adjustment of the upper, and upon the subsequent starting of the machine tlV e remaining` operations of the cycle, having to do with the overlayingq and fastening' ot the upper, are effected as is usual in machines ot the type illustrated.

As shown in Fig'. 3, the toe gripper cam 38 is constructed substantially as shown in the prior Bennion patent, and upon lie starting` of the machine acts to impart a progressive yielding upper pulling nievement to the toe gripper until the part o of the cam vgroove arrives in engagement with the roll Sil. At this point a projection of the cam begins to act on the roll to move it in the reverse direction, thereby raising the slide 22 to relai: the torce of the pull of the gripper. .els the cam continues its movement the roll is again moved inwardly toward the axis of the cam to impart a second downward pulling movement to the slide 22 which acts through the spring' 16 to move the toe gripper again yeldingly to pull the upper, the cam being shaped to move the slide to a slightly lower limit than in its rst pulling` movement. `While the side gripper cam 30 may loe shaped to operate the side grippers in any desired time relation to the toe gripper, it is contemplated that for the purpose of the give and take action of the illustrative machine this cam will be shaped, as in the machine of the prior Bennion patent, to impart pulling movement to the side ,Qjrippers substantially at the time ot the tension relaxing movement oit the toe gripper. rlhe toe gripper will thus operate 'to pull the upper lengthwise over the toe before the side grippers begin to pull it transversely, and will operate again to subject the upper at the toe to the tinal tension the side grippers have acted coord nately with the rela v'ing movement olI the toe gripper to draw the upper to the last bach olf the toe. The iirst stopping position ot the machine, at the end of the upper pulling` operation, is indi ated by the lower position oie the roll in Fig. 3.

ln order to insure i variahly Ytor each shoe, irrespectve of the character of the upper and the last and ot the friction hetween the last and the upper materials, moi/'ement of the toe gripper to relax the lengthwise tension oi" the upper, the cam slide 22 in the machine herein shown carries a pawl vwhich is arranged to engage ratchet teeth formed on a plate l2 secured on one side ot the end portion oit the toe `gripper updi w lever 6, the pawl being held normally n ei'in'agement vwith the pl hy the action. or a spring;v plunger which is mounted in the pawl and cam slide. ln the relative moven t ot the cani slide a1 d the updraw lever which occ in consequence oi resistance or the upper to the pulli ovement et the gripper, the pawl rides over the ratchet teeth, and as soon impart a r movement oecomes immed'ate such movement p and thus to the s awl again permitted to ride idly over tue ratchet teeth as may lie requ'red in imparting to the ,gripper the final yielding pull. The cam may, of cou e, be shaped to impart repeated tension rgfvements to the. slide, said prior flennion patent, in `which the pai-wl and ratchet mechanism would act repeatedly to impart positive relaingg :norenicn't to the gripper.

ln order to lrce the updraw lever (5 Ylrom the action oll the pawl il() when the` cam slide 22 is in its lowest position at the end of the final upper pulling` ope ation, the pawl is provided with an arm l-G to engage the periphery ot the cam wheel 38 and si-.vinpv the pawl away from the ratchet teeth, as shown in 2. This leaves the toe pgr'pper free to be manipulated by the operator in the customary manner .tor adjusting` the upper on the last while the :naehine is at rest with the tu per under tension, and also permits the toe gripper to spring upwardly out of the way usual upon its release from the upper. Since in the vlirst instance the slide 22 'is not moved so far downwardly as in its Enal pulling` movement, the pawl rests against the ratchet teeth in position to be ies immediately effective in the reverse upward movement of the slide, and is not disconnected from the teeth until the slide is moved to its final lower limit. In order that the reverse downward movement of the toe gripper and the compression of the gripper closing spring in the return of the parts to starting position may be effected by the action of the cam slide directly upon the swivel block 12 and not through the pawl and the ratchet teeth, the plate 42 above the teet-h is provided with a plane face 48 to be engaged by the pawl when the cam slide and the swivel block are in engagement with each other, as they are after the gripper has released the upper.

I-lfaving described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

l. In an upper pulling machine, the combination with means for gripping an upper on a last, of power driven operating means constructed to insure in the pulling of every upper alternate tension applying and tension relaxing relative movements of said upper gripping means and the last.

2. In an upper pulling machine, the combination with means for gripping an upper on a last, and operating mechanism for effecting relative movement of said gripping means and the last to pull the upper, of additional operating mechanism constructed to effect for each shoe irrespective of the character of the upper and the last a relative movement of said gripping means and the last to relax the pull on the upper in time relation to the upper pulling operation.

3. In an upper pulling machine, the combination with means for gripping an upper on a last, and operating mechanism for effecting relative movement of said gripping means and the last to pull the upper, of additional operating mechanism automatically operative to effect a positive relative movement of-said gripping means and the last to relax the pull on the upper in time relation to the upper pulling operation.

4L. In an upper pulling machine, the combination with means for gripping an upper on a last, of power driven operating means for effecting automatically relative movements of said upper gripping means and the last in determinate order to pull the upper, then positively to relax the pull, and then again to pull the upper.

5. In an upper pulling machine, the combination with means for gripping an upper on a last, oic power driven operating means automatically operative to effect in determinate order a series of relative movements of said gripping means andthe last. first to pull the upper yieldingly, then positively to relax the pull. and then to subject the upperto a final pull.

6. In an upper pulling machine, the combination with means for gripping an upper on a last, of mean for effecting a yieiding relative movement of said upper gripping means and the last to pull the upper, and a clutch device automatically operative in time relation to the pulling of the upper to effect a positive relative mov nient oiA the gripping means `and the 'last to relax the force of the pull.

7. In an upper pulling machine, the combination with upper gripping means, of power driven operating means constructed to impart to said upper gripping means automatically in each cycle of operations of the machine an upper pulling movement, then a positive reverse movement to relax the pull, and then another upper pulling movement. n

8. In a machine of the class described, the combination with an upper engaging gripper, of power driven operating means constructed to move said gripper to pull the upper and for each shoe to impart also to the gripper', irrespective of the character of the upper and the last, a reverse movement to relax the pull on the upper in time relation to the upper pulling movement.

9. In an upper pulling machine, the combination with an upper engaging gripper, of operating ymeans constructed to impart to said gripper in time relation an upper pullingvmovement, then a positive reverse movement to relax the force of the pull, and then another upper pulling movement beyond the limit of said first movement.

l0. In an upper pulling machine, the combination with an upper engaging gripper, and operating means for moving said gripper to pull an upper, of additional means automatically operative in time relation to the upper pulling movement of the gripper to move said gripper positively in the re` verse direction 'to relax the pull on the upper.

ll. In an upper pulling machine, the com-- bination with an upper engaging gripper, of operating mechanism timed to impart to sai-d gripper automatically in each cycle of operations of the machine separate movements topull ari-upper yieldingly and a determinate movement in the reverse direction to relax the pull on the upper between said pulling movements.

12. In an upper pulling machine, the combination withan upper engaging gripper, of a power' driven operating member, a connectionbetween said member and the gripper for moving the gripper to pull the upper, and an additional connection arranged to be operated by said member, yto impart a reverse movement to the gripper 'to relax the pull on the upper in time relation to itsk upper pulling movement.

'13. In anv upper pulling machine, the combination with an upper engaging gripiio per, of operating means comprising a. member vmovable alternately in opposite directions Yfor pulling the upper yieldingly and. tor then. relaxing the pullA on the upper while the gripper remains` in engagement with the upper, and adeviee automatically operative to effect a positive connection between said member and the gripper to move the gripper in the direction to relax the pull while permitting the member to move relatively to the gripper in the upper pulling operation.

14. In an upper pulling machine, the combination with an upper engaging gripper, et' gripper operating member, means ior moving said member alternately in opposite directions for pulling the upper and tor relaxing the tension of the upper, a yielding connection between said member and the gripper for imparting upper pulling movement to the gripper, and an additional connection between said member and the gripper for imparting tension relaxing movement positively to the gripper.

l5. ln an upper pulling machine, the combination with an upper engaging gripper, of a gripper' operating member, a yielding connection between said member and the gripper' for moving the gripper to pull the upper, operating means for imparting upper pulling movement to said member and for then moving the member reversely to relax the force of the pull, and a device automatically operative to prevent relative yield between said member and the gripper in the reverse movement of the member.

i6. ln an upper pulling machine, the combination with an upper engaging gripper, of a gripper operating member arrangedv for upper pulling movement and for alternate tension relaxing movement, and acluteh device automatically operative to effeet a positive connection between said member and the gripper only in the tension relaxing movement oi the member.

i7. ln an upper pulling machine, the combination with an upper engaging gripper, ot a gripper operating member, a yielding connection between said memberl and the gripper for moving the gripper to pull the upper, operating means for imparting upper pulling movement to said member and for then moving the member reversely to. relax the force of the pull, and a pawl and ratchet mechanism for effecting a positive connection between said member and the gripper in the reverse movement of the member.

1S. lin an upper pulling machine, the combination with an upper engaging gripper, ot a gripper lever connected to the gripper, a cam, slide yieldinglyconnected to said lever for imparting upper pulling movement to the gripper, cam means for movingsaid slide in a direction to pull the upper and for then imparting reverse movement to said slide to relax the tension ci the upper, and a device automatically operative to prevent relative yield between said cam slide and the gripper lever in the reverse movement of the slide.

19. ln an upper pullingy machine, the combination with an upper engaging gripper, of a gripper lever connected to the gripper, a cam slide yieldingly connected to said lever for imparting upper pulling movement to the gripper, cam means for moving said slide in a direction to lpull the upper and for then imparting reverse movement tol said slide to relax the tension of the upper, and a pawl and ratchet connection between said slide and the gripper lever arranged to permit the slide to be moved relatively to the lever in the upper pulling operation and to serve as a positive connection between the slide and the lever in the tension relaxing operation.

20, 4ln an upper pulling machine, the combination with an upper engaging gripper, ot a member yieldingly connected to said gripper for moving the ,gripper to pull the upper, means ior imparting tfo said member separate upper pulling movements with an intervening reverse movement Jfor relaxing the tension of the upper, and a device automatically operative to effeet a positive connection between said member and the gripper in the reverse movement of the member.

21. ln an upper pulling' machine, the combination with an upper engaging gripper, ot' a gripper lever connected to the gripper, a cam slide yieldingly connected to said lever for moving the gripper to pull the upper, cam means constructed to impart to said; slide separate upper pulling movements with an intervening reverse movement for relaxing the tension of the upper, and mechanism comprising a pawl on said slide and ratchet teeth on the gripper lever for effecting a positive connection between the slide and the lever in said reverse movement ot the slide.

22. ln an upper pullingmachine, the combination with an upper engaging gripper, of a gripper operating member movable alternately in opposite directions for pulling the upper and for relaxing the tension of the upper, a device for effecting a positive connection between said member and the gripper in the tension relaxing movement of the member, and means for rendering' said device subsequently inoperative to permit said member and the gripper to resume their starting relation.

23. In an upper pulling machine, the combination with an upper engaging gripper, of a gripper operating member movable alternately in opposite directions for pulling the upper and for relaxing the tension of the upper', a clutch device for effecting a positive connection between said member and the gripper in the tension relaxing movement of the member, and mechanism automatically operative subsequently to cause the clutch device to break said positive connection.

24. In an upper pulling machine, the combination with an upper engaging gripper, of a gripper operating member, means for imparting separate upper pulling movements to said member With an intervening reverse movement to relax the tension of the upper, a pawl and ratchet device for effecting a positive connection between said member and the gripper in the reverse movement of the member, and a device automatically operative in the final pulling movement of said member to disconnect the pavvl from the ratchet teeth.

25. In an upper pulling machine, the combination with an upper engaging gripper, of a gripper lever connected to said gripper, a cam slide yieldingly connected to said lever for moving the gripper to pull the upper, cam means for imparting to said slide movements alternately7 in opposite directions for pulling the upper and for relaxing the tension and a final movement to return the parts to starting position, a device automatically operative to effect a positive connection between said slide and the gripper lever in the tension relaxing movement of the slide, and means for rendering said device inoperative in the final return of the parts to start-ing position.

26. In 'an upper pulling machine, the combination with an upper engaging gripper,

of a gripper lever connected to said gripper,-

a cam slide yieldingly connected to said lever for moving the gripper to pull the upper, cam means for imparting to said slide separate upper pulling movements with an intervening movement in the reverse direction for relaxing the tension of the upper, pawl and ratchet mechanism for effecting a positive connection betvveen said slide and the gripper lever in the reverseI movement of the slide, and means automatically operative in the final upper pulling movement of the bination With an upper engaging gripper,l

of a gripper lever connected to said gripper, a cam slide yieldingly connected to said lever for moving the gripper to pull the upper, cam means for imparting successive upper pulling movements to said slide With an intervening movement in the reverse directi on for relaxing the tension of the upper, mechanism comprising a paWl on said slide and ratchet teeth on the gripper lever Jfor effecting a positive connection between'said slide and the lever in the reverse movement of the slide, and an arm on the pavvl arranged to be operated in the final upper pulling movement of the slide to disconnect the pawl from said ratchet teeth.

28. In a pulling-over machine, the combination With a toe gripper and opposite side grippers, and operating means for imparting upper pullingmovements to the toe and side grippers in time relation, of mechanism automatically operative to impart to the toe `gripper positive movement in the reverse direction to rela-X the pull on theupper in time relation to the upper pulling movement of the side grippers.

29. In a pulling-over machine, the com bination with opposite side grippers and means for operating them to pull an upper transversely. of a toe gripper, and operating mechanism for imparting to said toe gripper separate upper pulling movements and an intervening positive movement in the reverse direction for relaxing the pull on the upper in time relation to the pulling movement of the side grippers.

In testimony whereof I have signed my name to this specification.

ARTHUR BATES. 

